The little Dog learned, without more ado, And soon could sit upright and walk upright too; In deepest waters unfearing could spring, And whatever was lost could speedily bring.

The next simplest case involves one anopluran and one mallophagan species per host species (e.g., Haematopinus asini plus Domalinia equi on Equus caballus and Linognathus setosus plus Trichodectes canis on Canis familiaris). Cattle (Bos taurus) present a more complex case; they are infested by three anoplurans and one mallophagan, and attention to generic morphologic characteristics is required for their differentiation.

Let the great gods, / That keep this dreadful pother o’er our heads, / Find out their enemies now.

... brings tranquilized self-assurance... into the average everydayness of Dasein.